19918860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{25537}}^1$

素因数の和:25562

約数の個数: 48

約数和(自身を含む): 60065376

約数和(自身を除く): 40146516

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 25537, 51074, 76611, 102148, 127685, 153222, 255370, 306444, 331981, 383055, 510740, 663962, 766110, 995943, 1327924, 1532220, 1659905, 1991886, 3319810, 3983772, 4979715, 6639620, 9959430, 19918860]

約数ペア:

[(1, 19918860), (2, 9959430), (3, 6639620), (4, 4979715), (5, 3983772), (6, 3319810), (10, 1991886), (12, 1659905), (13, 1532220), (15, 1327924), (20, 995943), (26, 766110), (30, 663962), (39, 510740), (52, 383055), (60, 331981), (65, 306444), (78, 255370), (130, 153222), (156, 127685), (195, 102148), (260, 76611), (390, 51074), (780, 25537)]